Shoveling and loading machine



J. C. BHACKETT. SHOVELING AND LOADING MACHINE. APPLICATION FILED MAY I5. 1917.

Patented Mar. 15, 1921.

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WITNESSES' 977 w fi UNITED STATES PATENT OFFICE.

JOHN G. BRACKETT, OF CHICAGO, ILLINOIS, ASSIG'NOR TO MIDDLEMISS AND BRACKET'I, 0F MILWAUKEE, WISCONSIN, A. COPARTNERSHIP COMPOSED OF BRUCE A. IIDDLEMISS AND JOHN C. BBACKETT. I

SHOVELING AN D LOADING MACHINE.

To all whom itmay concern Be it known that 1, JOHN C. BRAGKETT, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in shoveling and Loading Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to shoveling and loading machines of a type adapted to work in confined quarters with limited room such as is commonly found in underground mining and tunneling.

The particular type of machine illustrated is of the overhead swinging delivery class, but is obviously adaptable to delivery laterally to the axis of the machine as for instance would be required where it is necessary to. load cars on tracks parallel to the track upon which the loading machine is operated.

My invention has for its objects:

First, to produce a machine of this character actuated by a single stationary air cylinder, or equivalent motive power device.

Second, to produce a type of a machine which, while primarily designed for hand manipulation of the valves, may readily be adapted to automatic continuous operation by such expedients as the construction of a slide or piston valve of the common type to operate in conjunction with the reciprocative elements shown.

Third, to provide a machine of this general type in which, while the digging stroke is followed by a direct withdrawal of the shovel from the material, this condition may readily be varied by changing the shape of the cam plate and similar ordinary mechanical developments so that the shoveling element may be given all or part of a vertical lifting motion immediately upon starting withdrawal-of the shoveling element from the material to be handled.

While I have illustrated a specific form of construction it will readily be understood that other elements of design may be included in the construction without departing from the essentials of the invention. In addition to the automatic operation feature described elsewhere it is ob- Sp ecification of Letters Patent.

Patented Mar.- 15, 1921.

Application filed May 15, 1917. Serial No. 168,692.

vious that any type of hinge bottom or similar dumping bucket may be. used instead of the particular-type of bucket illustrated, that t ie bucket may be dumped into a car direct or onto a'conveyer, as expediency may dictate.

. -In the accompanying drawings which illustrate a simple embodiment of my invention:

Figure 1- is a side view or elevation showing the shoveling element in digging and delivery position.

F g. 2 is a plan of the machine.

Fig. 3- is a diagram of the fluid-pressure connections necessary for operation of the motive element.

Referring to Fig. -1-, at E2; I have shown an air cylinder of the common type coacting with the piston l and piston rod 3 which terminates in a cross-head 4 to which are attached links 5 carrying shoveling element 6.

Links 5 terminate at the rear end in a downward bell crank extension 7 upon the extremity of which are mounted antifriction rollers 8 coacting with cam plate 9 in which a slot of particular design 10 may be cut.

The particular orbit through which the shovel element is designed to work is controllable by the shape and dimensions of this slot as well-as by the proportions of extension arms 7 of link 5.

In the" operation of my device air is admitted behind or to the right of piston 2 forcing the piston to the left hand extremity of cylinder 1; this throws cross-head 4 into position 4 indicated, anti-friction roller 8 having in the meantime traveled through position 8 into position 8*. In the meantime links 5 have swung vertically upward into position 5 which is the discharging position of the shoveling element G'at which point its contents are emptied into car 11, the ejection ofthe material from the shovel being assisted -by impact of link 5 against buffer 12 mounted on frame extension 13. Air is now admitted into the rear or lefthand end of cylinder 1 and the opposite end connected free to the atmosphere. This forces piston 2 to the right to the initial position shown, antifriction roller 8 having in the meantime traveled from position 8" through position 8 into normal position 8, and link 5 carrying "shovel element 6 has in the meantime returned to lower position ready for another shoveling stroke. This subsequent shoveling stroke 1s completed, as shown, when piston 1 is drawn completely to the right at which point the cycle of operation previously described is repeated.

The entire apparatus is mounted on truck 14 which in turn is carried by wheels 15 and 16, set at the standard narrow gage distance suitable for the mine or tunnel in which it is intended to operate the machine. Referring to Fig. -3-- I have illustrated the necessary valves and piping for control of theair or steam pressure by which the motive element is in this particular design operated. 17 is a supply pi e connected to housing 18 of plug 19. ith the plugin position shown, air is admitted into the rear or right-hand end of cylinder 1 by pipe 17, port 20 and pipe 21, the forward or lefthand end of the cylinder being in the meantime connected free to the atmosphere through pipe 22 and port 23. Rotation of plug 19 through. ninety de rees clockwise connects the forward or 1e t-hand end of cylinder 1 to the source of supply through pipe 17, port 23 and pipe 22, the rear end of the cylinder being in the meantime con nected free to the atmosphere through pipe 21 and port 20.

I claim as my invention:

1. In a machine of the kind specified, a carriage, a motive element rigid with respect thereto, a shovel operativel associ' ated therewith to be actuated thereliy, and a rigid element on the carriage engaging said shovel and. coacting with the motive element andv shovel to cause the latter to make areciprocating digging stroke followed by a.

load delivery stroke and vice versa.

2. In a machine of the kind specified, a

carriage, a motive element rigid with respect thereto, a-shovel operatively associated therewith to be actuated thereby and a cam element rigid with the carriage and en-\ means rigidly mounted on the carriage and having sliding and pivotal engagement with the shovel, and coacting with the motive element and shovel to cause the latter to make a movement forward and back for filling the shovel followed by a load delivery stroke and vice versa.

4. Ina machine of the kind specified, a carriage, a motive element rigid with respect thereto, a shovel operatively associated therewith to be actuated thereby, side plates rigid with the carriage and having cam slots therein, and projections on the shovel engaging in said cam slots for sliding and pivotal engagement with said plates, said cam slots coacting with the motive element and shovel to cause the latter'to make a forward and back digging stroke followed by a load delivery strokeand vice versa.

In testimony whereof I have signed my name in presence of two subscribing witnesses,

JOHN C BRACKETT,

Witnesses:

M. M. BoYLE, C. ll. BALDWIN, 

